protected override void OnAppearing()
{
base.OnAppearing();
pageNumber = 0;
UIData = new ObservableCollection <TextCellData>(FakeWebService.GetData(pageNumber, itemsPerPage));
var list = new ListView();
var cell = new DataTemplate(typeof(TextCell));
cell.SetBinding(TextCell.TextProperty, "Text");
cell.SetBinding(TextCell.DetailProperty, "Detail");
list.ItemTemplate = cell;
list.ItemsSource = UIData;
list.ItemAppearing += (object sender, ItemVisibilityEventArgs e) => {
var item = e.Item as TextCellData;
int index = UIData.IndexOf(item);
if (UIData.Count - 2 <= index)
{
AddNextPageData();
}
};
list.ItemTapped += (sender, args) => {
System.Diagnostics.Debug.WriteLine("ItemTapped");
};
Content = list;
}
private void AddNextPageData()
{
if (dataLoading)
{
return;
}
dataLoading = true;
pageNumber++;
List <TextCellData> nextPage = FakeWebService.GetData(pageNumber, itemsPerPage);
foreach (var item in nextPage)
{
UIData.Add(item);
}
dataLoading = false;
}